I'm sure there are original blueprints if you are that interested. You can contact the Ford facility that keeps the original copies.
"The block is the basic "Building block" to the whole engine and everything is built to it."
That is true, but if you have the block in front of you, you have that information. Short of a NOS block, almost all blocks have several rebuilds on them which my or may not have included decking the blocks. Flathead blocks are very thin in the deck area to begin with, so any decking needs to be kept to the bare minimum.
What are your objectives with the engine? If it is all out competition there are some world recorded holders here on the barn that may or may not be willing to share some of their secrets.
A lot of us have considerable high performance/race experience in the non-world record category. A little more information on what you are after might help.